Siebel Tools - Command line Compile in silent mode

[siebelNewbie]

All,

I am trying to compile Siebel 8 objects using commandline switches. The command runs fine but in the process it opens up the GUI. The command I am issuing is as follows

siebdev.exe /c c:\tools\tools.cfg /u sadmin /p password /d server /bc "siebel repository" C:\tmp\c.srf

I wanted to know if I could submit the command in silent mode(GUI shouldn't get instantiated). Is there any switch that could do that trick. Any help is appreciated.

Thanks